<template>
  <div>
    <div class="search">
        <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
    </div>
    <div 
      class="search-content" 
      ref="search" 
      v-show="keyword"
    >
       <ul>
          <li 
            class="search-item border-bottom" 
            v-for="item of list" 
            :key="item.id"
            @click="handleCityClick(item.name)">{{item.name}}</li> 
          <li 
            class="search-item border-bottom" 
            v-show="hasNoData">
            没有找到匹配数据
          </li>  
        </ul>   
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data () {
        return {
            keyword: '',
            list: [],
            timer: null
        }
    },
    methods: {
        handleCityClick (city) {
        this.changeCity(city)
        this.$router.push('./')
      },
      ...mapMutations(['changeCity'])
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    watch: {
        keyword () {
            if(this.timer){
                clearTimeout(this.timer)
            }
            if (!this.keyword) {
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities) {
                    this.cities[i].forEach((value) => {
                        if (value.spell.indexOf(this.keyword) > -1 || 
                           value.name.indexOf(this.keyword) > -1) {
                               result.push(value)
                           }
                    })
                }
                this.list = result
            }, 100)
        }
    },
    updated () {
        this.scroll.refresh()
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.search, {
            
        })
    }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height: .72rem
    padding: 0 .1rem
    background: $bgColor
    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      line-height: .62rem
      text-align: center
      border-radius: .06rem
      color: #666
  .search-content 
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
      
</style>